Amphibious bus



FIG. 1 is a front elevational view of an amphibious bus showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof; and,

FIG. 6 is a side elevation view thereof, with the wheels shown in recessed position. 

The ornamental design for an amphibious bus, as shown and described. 